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Sunflowers make small moves to maximize their Sun exposure – physicists can model them to predict how they grow
Charles Darwin’s detailed observations of plant movements, such as sunflower circumnutation and self-organization, reveal how randomness helps plants optimize growth and adapt to their environments. Sunflowers!
Chantal Nguyen, University of Colorado Boulder
Most of us aren’t spending our days watching our houseplants grow. We see their signs of life only occasionally – a new leaf unfurled, a stem leaning toward the window.
But in the summer of 1863, Charles Darwin lay ill in bed, with nothing to do but watch his plants so closely that he could detect their small movements to and fro. The tendrils from his cucumber plants swept in circles until they encountered a stick, which they proceeded to twine around.
“I am getting very much amused by my tendrils,” he wrote.
This amusement blossomed into a decadeslong fascination with the little-noticed world of plant movements. He compiled his detailed observations and experiments in a 1880 book called “The Power of Movement in Plants.”
In one study, he traced the motion of a carnation leaf every few hours over the course of three days, revealing an irregular looping, jagged path. The swoops of cucumber tendrils and the zags of carnation leaves are examples of inherent, ubiquitous plant movements called circumnutations – from the Latin circum, meaning circle, and nutare, meaning to nod.
Circumnutations vary in size, regularity and timescale across plant species. But their exact function remains unclear.
I’m a physicist interested in understanding collective behavior in living systems. Like Darwin, I’m captivated by circumnutations, since they may underlie more complex phenomena in groups of plants.
Sunflower patterns
A 2017 study revealed a fascinating observation that got my colleagues and me wondering about the role circumnutations could play in plant growth patterns. In this study, researchers found that sunflowers grown in a dense row naturally formed a near-perfect zigzag pattern, with each plant leaning away from the row in alternating directions.
This pattern allowed the plants to avoid shade from their neighbors and maximize their exposure to sunlight. These sunflowers flourished.
Researchers then planted some plants at the same density but constrained them so that they could grow only upright without leaning. These constrained plants produced less oil than the plants that could lean and get the maximum amount of sun.
While farmers can’t grow their sunflowers quite this close together due to the potential for disease spread, in the future they may be able to use these patterns to come up with new planting strategies.
Self-organization and randomness
This spontaneous pattern formation is a neat example of self-organization in nature. Self-organization refers to when initially disordered systems, such as a jungle of plants or a swarm of bees, achieve order without anything controlling them. Order emerges from the interactions between individual members of the system and their interactions with the environment.
Somewhat counterintuitively, noise – also called randomness – facilitates self-organization. Consider a colony of ants.
Ants secrete pheromones behind them as they crawl toward a food source. Other ants find this food source by following the pheromone trails, and they further reinforce the trail they took by secreting their own pheromones in turn. Over time, the ants converge on the best path to the food, and a single trail prevails.
But if a shorter path were to become possible, the ants would not necessarily find this path just by following the existing trail.
If a few ants were to randomly deviate from the trail, though, they might stumble onto the shorter path and create a new trail. So this randomness injects a spontaneous change into the ants’ system that allows them to explore alternative scenarios.
Eventually, more ants would follow the new trail, and soon the shorter path would prevail. This randomness helps the ants adapt to changes in the environment, as a few ants spontaneously seek out more direct ways to their food source.
In biology, self-organized systems can be found at a range of scales, from the patterns of proteins inside cells to the socially complex colonies of honeybees that collectively build nests and forage for nectar.
Randomness in sunflower self-organization
So, could random, irregular circumnutations underpin the sunflowers’ self-organization?
My colleagues and I set out to explore this question by following the growth of young sunflowers we planted in the lab. Using cameras that imaged the plants every five minutes, we tracked the movement of the plants to see their circumnutatory paths.
We saw some loops and spirals, and lots of jagged movements. These ultimately appeared largely random, much like Darwin’s carnation. But when we placed the plants together in rows, they began to move away from one another, forming the same zigzag configurations that we’d seen in the previous study.
We analyzed the plants’ circumnutations and found that at any given time, the direction of the plant’s motion appeared completely independent of how it was moving about half an hour earlier. If you measured a plant’s motion once every 30 minutes, it would appear to be moving in a completely random way.
We also measured how much the plant’s leaves grew over the course of two weeks. By putting all of these results together, we sketched a picture of how a plant moved and grew on its own. This information allowed us to computationally model a sunflower and simulate how it behaves over the course of its growth.
A sunflower model
We modeled each plant simply as a circular crown on a stem, with the crown expanding according to the growth rate we measured experimentally. The simulated plant moved in a completely random way, taking a “step” every half hour.
We created the model sunflowers with circumnutations of lower or higher intensity by tweaking the step sizes. At one end of the spectrum, sunflowers were much more likely to take tiny steps than big ones, leading to slow, minimal movement on average. At the other end were sunflowers that are equally as likely to take large steps as small steps, resulting in highly irregular movement. The real sunflowers we observed in our experiment were somewhere in the middle.
Plants require light to grow and have evolved the ability to detect shade and alter the direction of their growth in response.
We wanted our model sunflowers to do the same thing. So, we made it so that two plants that get too close to each other’s shade begin to lean away in opposite directions.
Finally, we wanted to see whether we could replicate the zigzag pattern we’d observed with the real sunflowers in our model.
First, we set the model sunflowers to make small circumnutations. Their shade avoidance responses pushed them away from each other, but that wasn’t enough to produce the zigzag – the model plants stayed stuck in a line. In physics, we would call this a “frustrated” system.
Then, we set the plants to make large circumnutations. The plants started moving in random patterns that often brought the plants closer together rather than farther apart. Again, no zigzag pattern like we’d seen in the field.
But when we set the model plants to make moderately large movements, similar to our experimental measurements, the plants could self-organize into a zigzag pattern that gave each sunflower optimal exposure to light.
So, we showed that these random, irregular movements helped the plants explore their surroundings to find desirable arrangements that benefited their growth.
Plants are much more dynamic than people give them credit for. By taking the time to follow them, scientists and farmers can unlock their secrets and use plants’ movement to their advantage.
Chantal Nguyen, Postdoctoral Associate at the BioFrontiers Institute, University of Colorado Boulder
This article is republished from The Conversation under a Creative Commons license. Read the original article.
STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.
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100 Percent of Sales Fund Local Charities on March 26 “Day of Giving”
MANASQUAN, N.J. /PRNewswire/ — Hoping to raise a record-breaking amount for charity this March, Jersey Mike’s Subs, known for its authentic fresh sliced/fresh grilled subs, asks customers to eat a sub and help a local cause. (View/download b-roll)
To celebrate the company’s 15th Annual Month of Giving, Jersey Mike’s locations across the country are joining forces with more than 200 local charities.
During the month of March, customers will have the option to round up their purchase to the nearest dollar or donate $1, $3, or $5 when placing their order. Charities include hospitals, youth organizations, food banks and more.
The campaign culminates in the nationwide event, Day of Giving, on Wednesday, March 26, when local Jersey Mike’s owners and operators will donate every single dollar that comes in to local charities.
At the first nationwide fundraiser in 2011, all of Jersey Mike’s 454 locations raised $600,000 for 66 charities. Since then, Jersey Mike’s annual Month of Giving has raised more than $113 million for hundreds of local charities.
This March, Jersey Mike’s hopes to exceed last year’s record-breaking national fundraising total of $25 million and help local charities striving to fulfill their missions and make a difference.
“I would like to extend a personal invitation to you and your family to visit Jersey Mike’s Subs throughout the month of March, and especially on Day of Giving when 100 percent of sales goes to help a great local cause,” said Peter Cancro, Jersey Mike’s founder and CEO, who this year celebrates 50 years since he bought his first sub shop at age 17.
In each market, Jersey Mike’s owners select charities that support local neighborhoods to build stronger communities.
For more information, visit jerseymikes.com/mog.
About Jersey Mike’s
Jersey Mike’s Subs, with more than 4,000 locations open and in development, serves authentic fresh sliced/fresh grilled subs on in-store freshly baked bread — the same recipe it started with in 1956. Passion for giving in Jersey Mike’s local communities is reflected in its mission statement “Giving…making a difference in someone’s life.” For more information, please visit our website or follow us on Facebook, Instagram, TikTok, and X. Join the conversation at #JerseyMikesGives.
Contact: Kyle Potvin, [email protected], 917-838-4500
SOURCE Jersey Mike’s Subs
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expo
Exciting Collaboration: Ketone Labs & Blue Pacific Flavors Unite to Transform Functional Beverages at Expo West 2025!
PRNewswire
March 4-7, 2025, marks a momentous occasion in the world of innovation at Expo West, and we’re thrilled to share the exciting news about the strategic partnership between two pioneers: Ketone Labs and Blue Pacific Flavors. This collaboration aims to revolutionize the functional beverage landscape with the introduction of goBHB®-powered drinks, combining science-backed formulation with mouthwatering flavors.
What’s Buzzing at Expo West?
Set in the vibrant city of Anaheim, California, Expo West 2025 is the place to be for industry professionals and health enthusiasts alike. Visitors can look forward to an exclusive sneak peek at groundbreaking non-stimulant energy beverages that harness the power of goBHB®. These innovative drinks stand out by delivering clean, sustained energy without the jitters associated with caffeine or taurine.
The Power of goBHB®: Fueling a Healthier Future
At the core of this partnership is goBHB®, a game-changing innovation that promises to uplift our daily wellness routines. Here’s a breakdown of what makes these beverages stand out:
- Brain Health: The cognitive benefits of goBHB® are remarkable! It enhances mental clarity and focus, making it perfect for those long workdays or study sessions.
- Gut Health: With specially designed formulations that support the microbiome, these beverages are as much about feeling good on the inside as they are about revitalizing your energy levels.
- Metabolic Energy: goBHB® serves as a rapid source of fuel, enabling endurance and performance, whether you’re hitting the gym or navigating a busy day.
Meet Our Innovators
Industry veterans Donald F. Wilkes, CEO of Blue Pacific Flavors, and Rob C. Rogers, Founder of Ketone Labs, are enthusiastic about this partnership and the future it holds. With Donald’s extensive experience in flavor science and beverage formulation and Rob’s commitment to pushing the boundaries of metabolic health, this collaboration is set to redefine expectations.
“In my 40+ years in the industry, I have never seen a technology as transformative as goBHB®,” Wilkes stated. “It’s a game-changer in metabolic health, offering a science-backed, clean-energy solution that fits today’s functional beverage landscape.”
Echoing this sentiment, Rob C. Rogers shared, “goBHB® is revolutionizing the industry, and our partnership with Blue Pacific Flavors is pivotal in unlocking its full potential.”
Tantalizing Taste Meets Cutting-Edge Science
One of the most exciting aspects of this partnership is the introduction of several unique and innovative flavored products, all developed by Blue Pacific Flavors. The day is coming when functional health drinks aren’t just good for you—they’ll taste fantastic too!
Will you be attending Expo West 2025? Be sure to visit Booth #4373 for a chance to sample these extraordinary beverages and see firsthand how goBHB® can integrate into your lifestyle. Attendees will have the opportunity to engage with the experts behind these innovations and learn more about the intersection of delicious flavor and health-conscious formulation.
Join Us on This Journey!
As we embark on this exciting journey in functional nutrition, we invite you to stay connected and follow along. Together, Ketone Labs and Blue Pacific Flavors are committed to delivering the next generation of delicious, effective, and innovative products tailored to modern consumer needs.
Let’s Change the Way We Think About Nutrition
Join us at Expo West 2025, and be part of the exciting new wave of functional beverages that promote brain health, gut health, and metabolic energy without compromising on flavor. The future of wellness awaits—let’s explore it together! 🥤✨
For more updates, follow us on our social media channels and explore the fascinating world of goBHB® and its incredible potential! See you in Anaheim!
STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.
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Metro Updates
Welcome to the latest updates on the progress of Metro projects in the Westside area of Los Angeles! As part of LA Metro’s commitment to improving transportation and community infrastructure, there are several important developments to share.
Upcoming Wilshire Boulevard Construction – What to Expect
Mark your calendars! Starting on March 17, 2025, the contractor will initiate deck removal and street restoration for the future Wilshire/Rodeo Station. Thanks to the City of Beverly Hills, an alternative closure plan has been approved, drastically reducing the originally planned 18 weekend closures to a streamlined three-week full closure.
During this closure, Wilshire Boulevard will be completely shut down between just west of Crescent Drive and just east of El Camino Drive. This essential closure will facilitate deck removal, street restoration, and restoration of water service lines, all while minimizing disruption to the community. Additionally, please be advised that the intersection of Wilshire Boulevard and Beverly Drive will be closed during this period.
For detailed information and the latest updates, visit the official website here. For immediate concerns, feel free to contact the Metro Hotline at 213.922.6934 or the Beverly Hills Customer Service at 310.285.2467.
D Line Section 1 & 2 Community Meeting – Beverly Hills Stations
On March 12, 2025, Metro is hosting an in-person community meeting to provide the public with an update on the D Line Extension’s Beverly Hills stations. This informative session will cover key construction progress, project milestones, and the anticipated benefits of the new Wilshire/La Cienega and Wilshire/Rodeo stations. Stay tuned for more details!
D Line Art Workshop
In an exciting initiative, Metro Art is inviting the Veteran community to a free art workshop designed to uplift Veteran stories. This fun and engaging event will allow participants to learn new artistic skills and collaborate with an artist in designing construction site banners for the future D Line Metro station that will serve the West LA VA.
Event Details:
- Date: March 8, 2025
- Time: 10 AM – 1 PM (Drop In)
- Location: Heroes Golf Course, 11301 Wilshire Blvd, Los Angeles, CA 90073
Art supplies and refreshments will be provided, and all ages and experience levels are welcome! Click here for the event flyer and to RSVP.
Stay tuned for more updates on these projects and how they will enhance mobility and community engagement in the Westside of Los Angeles!
Visit the website for details and the latest updates: https://bit.ly/41by7K4
The Bridge is a section of the STM Daily News Blog meant for diversity, offering real news stories about bona fide community efforts to perpetuate a greater good. The purpose of The Bridge is to connect the divides that separate us, fostering understanding and empathy among different groups. By highlighting positive initiatives and inspirational actions, The Bridge aims to create a sense of unity and shared purpose. This section brings to light stories of individuals and organizations working tirelessly to promote inclusivity, equality, and mutual respect. Through these narratives, readers are encouraged to appreciate the richness of diverse perspectives and to participate actively in building stronger, more cohesive communities.
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